Best Petzl Grigri Belay Device

Product Name: Best Petzl Grigri Belay Device
Like new condition. Husband tried to use it, but it didn't work for the rope he was using. Retails for $100. From the manufacturer: GRIGRI sets the standard for belay devices. In the gym or at the crag, it makes belaying easier with cam-assisted blocking. Equipped with an ergonomic handle, providing easy control for a smooth and comfortable descent for the climber. Weight: 175 g Rope compatibility: 8.5 to 11 mm single rope Material(s): best Aluminum side plates, stainless steel cam and friction plate, reinforced nylon handle.